It shows North Korea (in 168th and last place), Turkmenistan (167th), and Eritrea (166th) to be the worst violators of press freedom. The United States, France, and Japan, also slip in this year’s rankings.

For more information, see RSF’s announcement here.
Given that RSF has data going back several years, it would not be too difficult to use Google Earth’s time series function to visualize how various countries’ performances changes over time.